docs: update registry agents (#428)

Co-authored-by: benbrandt <2111074+benbrandt@users.noreply.github.com>

Author: acp-release-bot[bot]

docs/get-started/registry.mdx

@@ -248,29 +248,7 @@ Visit [the registry repository on GitHub](https://github.com/agentclientprotocol
       <code>2.0.1</code>
     </p>
   </Card>
-  <Card
-    title="OpenCode"
-    href="https://github.com/sst/opencode"
-    icon={
-      <svg
-        width="20"
-        height="20"
-        className="agent-icon"
-        aria-hidden="true"
-        focusable="false"
-        viewBox="0 0 16 16"
-        fill="none"
-        xmlns="http://www.w3.org/2000/svg"
-      >
-        <path
-          fillRule="evenodd"
-          clipRule="evenodd"
-          d="M13 14H3V2H13V14ZM10.5 4.4H5.5V11.6H10.5V4.4Z"
-          fill="currentColor"
-        />
-      </svg>
-    }
-  >
+  <Card title="OpenCode" href="https://github.com/sst/opencode">
     <p class="text-xs mt-3">
       <code>1.1.42</code>
     </p>